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• Also called: Retina 5K, 27-Inch, 2020, Retina 5K, 27-Inch, 2020 - BTO/CTO - iMac20,1 - A2115 - Apple 3442

https://everymac.com/systems/apple/imac/specs/imac-core-i9-3.6-10-core-27-inch-retina-5k-2020-specs.html

Processor (CPU) CPU Name Intel® Core™ i9-9900K CPU @ 3.60GHz Threading 1 CPU - 8 Core - 16 Threads Frequency 3590.32 MHz (36 * 99.73 MHz) - Uncore: 3291.1 MHz Multiplier Current: 36 / Min: 8 / Max: 50 Architecture Coffee Lake / Stepping: P0 / Technology: 14 nm CPUID / Ext. 6.E.C / 6.9E IA Extensions MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, EM64T, AES, AVX, AVX2, FMA3, TSX Caches L1D : 32 KB / L2 : 256 KB / L3 : 16384 KB Caches Assoc. L1D : 8-way / L2 : 4-way / L3 : 16-way Microcode Rev. 0xF0 ► Intel SA-00233 Patched ◄ TDP / Vcore 95 Watts / 1.011 Volts Temperature 100 °C / 212 °F Type Retail (Stock Frequency : 3600 MHz) Cores Frequencies #00: 3590.32 MHz  #01: 3590.32 MHz  #02: 3590.32 MHz  #03: 3590.32 MHz 

1. 04: 4487.90 MHz  #05: 3590.32 MHz  #06: 4487.90 MHz  #07: 3989.24 MHz 

Motherboard Model Apple Inc. Mac-AA95B1DDAB278B95 Socket Socket 1151 LGA North Bridge Intel Coffee Lake rev 0A South Bridge Intel Q370 rev 10 BIOS Apple Inc. 1916.40.6.0.0 (09/13/2022) Memory (RAM) Total Size 65536 MB Type Dual Channel (128 bit) DDR4-SDRAM Frequency 1329.7 MHz (DDR4-2660) - Ratio 3:40 Timings 19-19-19-43-2 (tCAS-tRCD-tRP-tRAS-tCR) Slot #1 Module Avant Technology 16384 MB (DDR4-2666) - P/N: J642GU42J9266NF Slot #2 Module Avant Technology 16384 MB (DDR4-2666) - P/N: J642GU42J9266NF Slot #3 Module Avant Technology 16384 MB (DDR4-2666) - P/N: J642GU42J9266NF Slot #4 Module Avant Technology 16384 MB (DDR4-2666) - P/N: J642GU42J9266NF Graphic Card (GPU) GPU Type Radeon Pro Vega 48 GPU Brand Apple GPU VRAM 8176 MB Storage (HDD/SSD) Model #1 Name APPLE SSD SM1024L (FW: CXS7LA0Q) Model #1 Capacity 931.8 GiB (~1000 GB) Model #1 Type Fixed, SSD - Bus: NVMe (17) Display Screen #1 Apple Computer iMac (APPAE26) Screen #1 Spec 27.2 inches (69.1 cm) / 2560 x 2880 pixels @ 0-0 Hz Screen #2 Dell Computer DELL S3219D (DELD0EF) Screen #2 Spec 32.1 inches (81.5 cm) / 2560 x 1440 pixels @ 48-75 Hz Screen #3 32HC5QR Z (AOP0828) Screen #3 Spec 31.5 inches (80 cm) / 1920 x 1080 pixels @ 48-240 Hz Miscellaneous Windows Version Microsoft Windows 10 (10.0) Professional 64-bit CPU-Z Version 2.03.0 (64 bit)

Apple iMac 27-Inch “Core i9” 3.6 (5K, 2020) Specs Identifiers: Retina 5K, 27-Inch, 2020 - BTO/CTO - iMac20,1 - A2115 - 3442

All iMac 27-Inch Models ]] | All 2020 Models | Bookmark & Share | What are all the differences between the "2020" Aluminum iMac models | [[ Contract All Details

Introduction Date: August 4, 2020 Discontinued Date: March 8, 2022 Processors: 1 (10 Cores) Architecture: 64-Bit Geekbench 2 (32): N/A Geekbench 2 (64): N/A Geekbench 3 (32): N/A Geekbench 3 (32): N/A Geekbench 3 (64): N/A Geekbench 3 (64): N/A Geekbench 4 (SC): 6237 Geekbench 4 (MC): 38548 Geekbench 5 (SC): 1209 Geekbench 5 (MC): 8886 Processor Speed: 3.6 GHz Processor Type: Core i9 (I9-10910) Details: This model is powered by a 14 nm, 64-bit “10th Generation” Intel Core i9 “Comet Lake” (I9-10910) processor which includes ten independent processor “cores” on a single silicon chip. Each core has a dedicated 256k level 2 cache, shares 20 MB of level 3 cache, and has an integrated memory controller (dual channel). It supports Turbo Boost up to 5.0 GHz.

This model also has a T2 security chip.

Also see: How fast are the “2020” iMac models compared to one another? How fast are they compared to the “2019” iMac models and the iMac Pro? Turbo Boost: 5.0 GHz Custom Speeds: N/A Processor Upgrade: LGA 1200* FPU: Integrated System Bus Speed: 8 GT/s* Cache Bus Speed: 3.6 GHz (Built-in) ROM/Firmware Type: EFI EFI Architecture: 64-Bit L1 Cache: 32k/32k x6 L2/L3 Cache: 256k x6, 20 MB RAM Type: PC4-21300 DDR4 Min. RAM Speed: 2666 MHz Details: Supports 2666 MHz PC4-21300 DDR4 SDRAM SO-DIMMs (260-pin).

Also see: How do you upgrade the RAM in the “2020” Tapered Edge Aluminum iMac models? Is it even possible? What type of RAM do they use? How much RAM does each model actually support? Standard RAM: 8 GB Maximum RAM: 128 GB Details: *By default, 8 GB of RAM is installed as two 4 GB memory modules (and two slots are unoccupied). Apple offered 16 GB, 32 GB, 64 GB, and 128 GB upgrades at the time of purchase for an extra US$200, US$600, US$1000, and US$2600, respectively, but this model is easy to upgrade and third-parties offer compatible RAM for much less.

In the US (and many other countries), site sponsor Other World Computing sells memory – as well as other upgrades – for this iMac.

In the UK, site sponsor Flexx sells memory and other upgrades for this iMac.

In Germany, site sponsor CompuRAM sells memory and other upgrades for this iMac.

In France, site sponsor MacWay sells memory and other upgrades for this iMac.

In Australia, site sponsor Macfixit sells memory and other upgrades for this iMac.

Also see: Actual Max RAM of All G3 & Later Macs. Motherboard RAM: None* RAM Slots: 4 Video Card: Radeon Pro 5300* VRAM Type: Dedicated Details: If configured as a custom processor upgrade for the iMac 27-Inch “Core i5” 3.3 (5K, 2020) (MXWU2LL/A), this model has an AMD Radeon Pro 5300 graphics processor with 4 GB of dedicated GDDR6 video memory.

If configured as a custom processor upgrade for the iMac “Core i7” 3.8 (5K, 2020) (MXWV2LL/A), this model has an AMD Radeon Pro 5500 XT graphics processor with 8 GB of dedicated GDDR6 video memory.

Which “Tapered Edge” iMac have video processors with dedicated memory? Which have integrated memory? Standard VRAM: 4 GB, 8 GB

• Maximum VRAM: 4 GB, 8 GB*

Built-in Display: 27“ 16:9 Widescreen Native Resolution: 5120×2880 Details: This model has a 27” LED-backlit 16:9 widescreen TFT active matrix “Retina 5K” display with IPS and True Tone technology, a native resolution of 5120×2880, a “wide color” DCI-P3 gamut, and brightness of 500 nits.

For an extra US$500, at the time of system purchase, Apple also originally offered this display with a “nano-texture glass” surface to reduce glare. On April 20, 2021, Apple reduced the price of this display upgrade to US$300.

In the UK, site sponsor ALB Repair offers component-level logic board repair, display repair, and other repair services for this iMac. No fix, no fee!

In Germany, site sponsor Conodi provides high quality Mac and PC repair services as well as remote home office setup and troubleshooting. In-person and mail order repair services include the display and graphics chip as well as RAM and SSD upgrade services and more for this iMac.

In Spain, site sponsor iRepairs provides affordable repair and data recovery services. In-person and by mail repair services include the display, graphics card, motherboard, power supply, and more for this iMac.

In Singapore, site sponsor Esmond Service Centre provides highly regarded repairs for the display, graphics card, motherboard, power supply, and more, all with a free estimate and fast turnaround for this iMac.

In Hong Kong, site sponsor iCertified provides well-reviewed repair services for the display, logic board, water damage, and more, all with a 180-day warranty; free diagnostics and estimates; and optional pickup and delivery for this iMac. 2nd Display Support: Dual/Mirroring* 2nd Max. Resolution: 6016×3384 Details: *This model can simultaneously support the internal display at full native resolution and up to one 6016×3384 (6K) external display at 60 Hz with support for 1 billion colors; one 5120×2880 (5K) external display at 60 Hz with support for 1 billion colors; two 3840×2160 (4K UHD) external displays at 60 Hz with support for 1 billion colors; or two 4096×2304 (4K) external displays at 60 Hz with support for millions of colors. It supports both extended desktop (second workspace) and video mirroring (internal display duplicated on the external display) modes. Standard Storage: 512 GB SSD* Std. Storage Speed: N/A Details: By default, this model has a 512 GB SSD.

If configured as a custom processor upgrade for the iMac 27-Inch “Core i5” 3.3 (5K, 2020) (MXWU2LL/A), this model could be upgraded to a 1 TB or 2 TB SSD at the time of purchase for an extra US$200 or US$600, respectively.

If configured as a custom processor upgrade for the iMac “Core i7” 3.8 (5K, 2020) (MXWV2LL/A), this model can be upgraded to a 1 TB, 2 TB, 4 TB, or 8 TB SSD at the time of purchase for an extra US$200, US$600, US$1200, and US$2400, respectively.

In the US (and many other countries), site sponsor Other World Computing sells external storage upgrades for this iMac.

Also see: SSD Compatibility Guide for All G3 & Later Macs. Storage Dimensions: Soldered* Storage Interface: Soldered* Standard Optical: None* Standard Disk: None Standard Modem: None Standard Ethernet: 10/100/1000Base-T* Details: *Gigabit Ethernet standard. 10-Gigabit Ethernet also was available at the time of purchase as a US$100 upgrade. Standard AirPort: 802.11ac* Standard Bluetooth: 5.0 USB Ports: 4 (3.0) Firewire Ports: None Expansion Slots: SDXC SD Card Expansion Bays: None Details: In the US (and many other countries), site sponsor Other World Computing sells a wide variety of external expansion options and hand-picked accessories like external storage, stands, keyboards, cables, adapters, speakers, and more for this iMac.

In Australia, site sponsor Macfixit offers an extensive selection of external expansion options and accessories like docks, stands, chargers, keyboards, security products, and more for this iMac. Incl. Keyboard: Magic Keyboard* Incl. Input: Magic Mouse 2* Case Type: All-in-One Form Factor: 27“ iMac Tapered Edge Apple Order No: BTO/CTO Apple Subfamily: Retina 5K, 27-Inch, 2020 Apple Model No: A2115 (EMC 3442) Model ID: iMac20,1 Details: Please note that these identifiers refer to more than one model.

Also see: All Macs with the A2115 Model Number, the 3442 EMC Number, and the iMac20,1 Model Identifier.

For more about these identifiers and how to locate them on each Mac, please refer to EveryMac.com's Mac Identification section. Battery Type: N/A Battery Life: N/A Pre-Installed MacOS: X 10.15.6 (19G2005) Maximum MacOS: Current Minimum Windows: 10 (64-Bit)* Maximum Windows: 10 (64-Bit)* MacOS 9 Support: None Windows Support: Boot/Virtualization Details: Also see: Are there any third-party programs to run Mac OS 9/Classic applications on Intel Macs?

Site sponsor OHS specializes in heavily upgraded Macs capable of running both Mac OS X and Mac OS 9 applications.

For more on running Windows on Intel Macs, please refer to the exhaustive Windows on Mac Q&A. Dimensions: 20.3 x 25.6 x 8 Avg. Weight: 19.7 lbs. (8.92 kg) Original Price (US): US$2499, US$2699* Est. Current Retail: US$1700-US$2000 Details: This model is a “configure-to-order” configuration of either the iMac “Core i5” 3.3 (5K, 2020) (MXWU2LL/A) or iMac “Core i7” 3.8 (5K, 2020) (MXWV2LL/A).

If otherwise configured stock, the 3.6 GHz 10-Core Core i9 processor adds US$500 to the price of the former model (MXWU2LL/A) and US$400 to the price of the latter (MXWV2LL/A), for a total cost of US$2499 or US$2699, respectively.

To purchase a new iMac in the US, please visit site sponsor Adorama, which always has free shipping (as well as some recently discontinued/open box Apple hardware at bargain prices).

Photo Credit: Apple, Inc.